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Need help | fastboot devices not showing anything

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nirmitlamed

Member
Sep 4, 2012
34
5
Hello,
I want to flash TWRP 3.0 to my Galaxy s2 so i can maybe install Lineage rom. I have ADB command enabled and using "adb devices" it does recognize my phone and under device manager you can see it recognize the phone as android phone. But when entering into fastboot mode and entering "fastboot devices" it returns nothing. for some reason it doesn't recognize the phone as it should be. In device manager it does recognize it as "samsung mobile usb cdc composite device".

I have windows 10 and i tried even on mac os but no success.
 

MigoMujahid

Senior Member
Aug 31, 2015
1,920
680
New York
Hello,
I want to flash TWRP 3.0 to my Galaxy s2 so i can maybe install Lineage rom. I have ADB command enabled and using "adb devices" it does recognize my phone and under device manager you can see it recognize the phone as android phone. But when entering into fastboot mode and entering "fastboot devices" it returns nothing. for some reason it doesn't recognize the phone as it should be. In device manager it does recognize it as "samsung mobile usb cdc composite device".

I have windows 10 and i tried even on mac os but no success.
Why don't you use Odin instead.
And also be aware that twrp won't work unless you have an isorec kernel, there are many guides you can use, for example the one in my description.
 
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    Hello,
    I want to flash TWRP 3.0 to my Galaxy s2 so i can maybe install Lineage rom. I have ADB command enabled and using "adb devices" it does recognize my phone and under device manager you can see it recognize the phone as android phone. But when entering into fastboot mode and entering "fastboot devices" it returns nothing. for some reason it doesn't recognize the phone as it should be. In device manager it does recognize it as "samsung mobile usb cdc composite device".

    I have windows 10 and i tried even on mac os but no success.
    Why don't you use Odin instead.
    And also be aware that twrp won't work unless you have an isorec kernel, there are many guides you can use, for example the one in my description.